1 files changed, 6 insertions, 2 deletions

diff --git a/arch/ppc/kernel/traps.c b/arch/ppc/kernel/traps.c
index 16adde6b429d..42d980e82bdc 100644
--- a/arch/ppc/kernel/traps.c
+++ b/arch/ppc/kernel/traps.c
@@ -159,7 +159,7 @@ void _exception(int signr, struct pt_regs *regs, int code, unsigned long addr)
  */
 static inline int check_io_access(struct pt_regs *regs)
 {
-#ifdef CONFIG_PPC_PMAC
+#if defined CONFIG_PPC_PMAC || defined CONFIG_8xx
         unsigned long msr = regs->msr;
         const struct exception_table_entry *entry;
         unsigned int *nip = (unsigned int *)regs->nip;
@@ -178,7 +178,11 @@ static inline int check_io_access(struct pt_regs *regs)
                         nip -= 2;
                 else if (*nip == 0x4c00012c)    /* isync */
                         --nip;
-                if (*nip == 0x7c0004ac || (*nip >> 26) == 3) {
+                /* eieio from I/O string functions */
+                else if ((*nip) == 0x7c0006ac || *(nip+1) == 0x7c0006ac)
+                        nip += 2;
+                if (*nip == 0x7c0004ac || (*nip >> 26) == 3 ||
+                        (*(nip+1) >> 26) == 3) {
                         /* sync or twi */
                         unsigned int rb;